Oil-well-testing device



' Dec. 30, 1930.. f E, ,ll-L (30X OIL wELI. TESTING DEVICE Filed Feb. 4,1927 Patented Dec. 30, 1930 ERNEST H. COX, OF DUNCAN, OKLAHOMAOIL-WELL-TESTING DEVICE Application led February 4, 1927. Serial No.165,984.

' This invention relates to well drilling apparatus and has specialreference to means 4 for testing wells in order to ascertain whether ornot oil, water, or the like are in the path 6 of the hole being drilled,i. e., in the stratum which has been reached by the drill bit but whichhas not as yet been bored through.

The invention disclosed herein is an improvement over my prior PatentNo. 1,347,534, granted July 27, 1920.

An object of the invention resides in the provision of a simple andinexpensive means by which a sample of the oil, sand,water or the likeat the bottom of the hole being bored 15. may be brought to the surfacefor examination and analysis prior to the time of sinking the expensivewell casing which is ordi-v narily provided.

Another object of the invention resides in the construction of such adevice combined with an effective and reliable device which willfunction to shut off slush, mud, water, etc., which is in the bottom ofthe well from the liquid in the lower stratum from which the sample isto be taken.

Other objects and advantages 'of the invention will be apparent from thefollowingdescription when taken in connection with the accompanyingdrawing; in which Figure l is a vertical longitudinal section ythroughthe vtesting device. 1

Figure 2 is an elevational view thereof.

-Figure 3 is a section taken on line 3-3 of Figure 1. Figure 4 is asection taken on line 4-4 of Figure 1.

Figure 5 is a sectional View through the apparatus` when the openings 14and 15 are in registration; and

Figure 6 is a section taken on line 6--6 of Figure 1.

Referring tothe drawing in greater detail the numeral 1 designates adrill stem of any ordinary or conventional form and to the lower end ofwhich is threadedly or other- Wise attached my novel testing device re-Aferred to generally by the numeral 2.

The testing device consists primarily of a tubular member 3 providedwith a head 4 and 5o a. shoulder or abutment 5, threads 6 being isthreaded to the lower end of this section.

`As indicated in Figure 1 of the drawing a coil spring 12 encircles theupper end` of the tubular member 3 and has its upper end in engagementwith the head 4 and its lower end in engagement with the stopper `10 and65 sleeve 8.- f

In assembling the device thus far described the nipple 11 is threaded tothe stopper or pipe se'ction 9 and this element then slipped over thesleeve 8 and threaded to 70 the upper end thereof. The coil springv 12is then passed over the tubular member 3 with the upper end encirclingthe abutment 5. Next the combined sleeve and stopper 8 10 is slid overthe lower end of the tubular V7a member against the pressure of spring.'12, and the cap 13 is then threaded to the lower end of the member 3. v

Both the tubular member 3 and the sleeve 8 are provided withsymmetrically arranged s@ series of perforations or passages 14 and 15respectively and in order that the series of perforations may always bemaintained in perfect alignment a key 16 extends inwardly of the sleeve8 and is received in the longitue5 dinally extending slot 17 formed inthe lowery 1(3nd of the outer wall of the tubular mem- In operation, theparts being in the position shown in Figure 1, with the perforations a?14 and 15 out of registration dueto the fact that the spring 12 isforcing the sleeve 8 downwardly so that the'sleeve 8 is in engagementwith the cap 13, the device is lowered into the hole being drilled untilthe stopper c; l0 engages the small pocket previously formed at thebottom of the well by means of the drill bit. Engagement of the stopperwith the walls lof the pocket will of course limit further downwardmovement of the 1.0

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sleeve 8 which is secured to the stopper 10.

rations 14 and 15 will register and a sam le of l the oil or otherliquid in the pocket wil pass into the interior of the tubular member.In

this position of the parts the stopper 10 will of course seal off themud, slush, etc., above the perforations 14-15 thereby preventing theentrance of any of this undesirable matter int-o the testing devicewhile the perforations are in register. Raising ofthe drill bit andtesting device will allow the spring 12 to move the sleeve 8 downwardlywith respect to the tubular member and thus close the passages 14-15,whereby the sample of the material may be carried to the top of thewell.

Due to the construction and operation ust described it will be apparentthat the present device is of especial value in testing wells for thereason that uncontaminated samples of the liquid may be readily obtainedprevious to the process of installing the expensive well casing. It willalso be observed that the construction itself is simple and reliable inoperation, of few parts which may be readily assembled, and'that theentire device is comparatively inexpensive.

In accordance with the patent statutes I have described what I nowbelieve to be the best embodiment of the invention, but I do not wish tobe understood thereby as limiting myself or the scope of the invention,as many'.

changes and modifications may be made without departing from the spiritof the invention; all such I aim to include in the scope of the appendedclaims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. In a device of the class described a tubular' member adapted to besecured to the lower end of a drill stem, a sleeve encircling saidtubular member and mounted for sliding movement with respect thereto, astop er and packer element also encircling said tubular member andsecured to the upper end ot' said sleeve, said tubular member and sleeveprovided with perforations adapted to register when the sleeve is at theupper limit of its sliding movement, and means normally holding saidsleeve in a'position in which said perforations are out of register.

2. [n a device of the class described a tubular member adapted to besecured to the lower end of a drill stem, a sleeve encircling saidtubular member and mounted for sliding movement with respect thereto, arubber stopper also encircling said tubular member and secured to theupper end of said sleeve, a

ERNEST H. COX.

